What is 5HTP?

5-HTP (5-hydroxytryptophan) is the direct precursor to serotonin. It is used as therapy for some forms of depression.

Users of the party drug MDMA may are advised to take 5-HTP supplements to ease the effect of serotonin depletion caused by MDMA. Many MDMA users take 5-HTP to try to enhance their high.